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Eldorado rich carb problem

Discussion in 'Loop & Tonti' started by Oregon John, Feb 28, 2016.

  1. Oregon John

    Oregon John Just got it firing!

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    Loopframe, original square slide DelOrtos. In storage for decade, carbs cleaned several times, including disassembly of the internal pump mechanisms. Bike now runs well, but only if the chokes are on just a bit. If forced to wide throttle, does not need choke. But idles best on closed chokes. Plugs are dark. Currently has well-cleaned K&N's, but will behave the same even if no air cleaners at all. Raising the needles a notch does not change things either.
    Classic thinking indicated changing the slides, but why would this be necessary?
    Ideas, guys?
     
  2. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Check the float level and make sure the pilot and main jets are not plugged. I recently brought a neglected Eldorado back to life and getting the carbs right was difficult.
     
  3. Amboman

    Amboman Cruisin' Guzzisti

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  4. Oregon John

    Oregon John Just got it firing!

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    Good suggestion for anyone working on Guzi carbs - I found over the years that DelOrto pilot jets have the tiniest, most clog-prone holes of all.
     
  5. Oregon John

    Oregon John Just got it firing!

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    Charlie's note on ultrasonic dip [or carb cleaner dip, on the above site] may just do it - that's the one cleaning step I hadn't taken yet. The heavy-duty carb cleaner [comes in a bucket] is a really noxious chemical. Since the tiny passages in the carb body mostly affect idle, I had originally thought the problem elsewhere. But it's good to eliminate every possible culprit.
     
  6. Amboman

    Amboman Cruisin' Guzzisti

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    I no longer use the "carb cleaner in a bucket", haven't for years. Since I bought a cheap ultrasonic cleaner, I've disposed of all the toxic waste. ;-) I've also found that Super Clean in a spray bottle works better than just about anything else. It's the only product I've found that safely removes "varnish" from carb floats.
     
  7. Oregon John

    Oregon John Just got it firing!

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    Thanks, Charlie - I'm scheduling a trip to HF today......
     

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